WUSB54G.V4 - XPHome SP2 to BSOD

Have a Dell Dimension 3100 running XP Home SP2. Have had WUSB54G.V4 running on this system reliably for over a year. Needed to shut system down for som eroutine cleaning.

Upon startup, got the dreaded BSOD, with a stop code of 0x0000007E. Disconnected wusb54g and was able to reboot without a problem. Reconnecting the WUSB54G immediately results in BSOD, with a stop code of 0x0000007E.

Chatted with LTS (Linksys Tech Support). Uninstalled Network Monitor 4.2 at LTS request. Installed only drivers. No correction of problem. Moved WUSB54G from problem system to another 3100, also with a WUSB54G. Both adapters work on second computer. Trying both adapters on problem system result in BSOD. LTS suggested I contact Dell for resolution.

At request of Dell Tech Support, installed latest RALink software for WiFi that contains rt2500usb.sys. At point in setup of RALink software where adapter is to be plugged in, BSOD apprears when adapter is plugged in. USB memory is accessible from all 6 USB ports, where WUSB54G causes BSOD screen on all ports. Dell tells me to contact LTS, as problem is with Linksys hardware.

Doing a search for rt2500usb.sys on the problem system finds 4 instances of driver in 4 different locations: Oldest, dated 5/4/2004, is located in C:\Windows\system32\drivers. Another, dated 10/15/2005, was downloaded from Linksys earlier this evening. (2) dated 11/8/2006, are located in C:\Windows\system32\"
DRVSTORE\\rt2500sub_DA522D2637378F196455D017847032DC5017844 and C:\Program Files\RALINK\RT7x Wireless LAN Card\Installer\WINXP.

I'm at a loss right now. Prefer not to tun copper to this system, as the router is on the second floor and system having problem is in the basement.